Diesel Progress North American

FREEWHEEL OPTION FOR
BLACK BRUIN MOTORS
Internal valve system means no additional components needed for freewheeling mode
BY BRENT HAIGHT

Black Bruin has introduced optional internal freewheeling valves designed for its BB and BBC Series hydraulic motors. According to Brandon Pickering, marketing and product manager at North American Hydraulics, the integral freewheeling valve simplifies the hydraulic circuit because no additional external freewheeling valves or pumps are needed for the freewheeling mode to occur.

North American Hydraulics is a marketing and service arm for hydraulic component and gearbox manufacturers throughout the world. It is the exclusive North American supplier of Black Bruin products.

“You can freewheel this motor mechanically without the need for an external pressure source, achieving minimal power loss,” said Pickering. “Other motors require a pressure source, which allows for the freewheel mode to occur. These designs require additional pumps, more complicated circuits and an external freewheel valve.

“Black Bruin’s BB and BBC Series motors now offer an internal freewheeling valve, which simplifies the system. Shifting is faster and more reliable. Motors can disengage and re-engage on the fly. This motor is ideal for any

Black Bruin offers low-speed,
high-torque motors with power
outputs from 20 to 350 hp, operat-
ing speeds up to 500 rpm and pres-
sures to 6500 psi.
assist-drive application and multiple-
speed hydrostatic transmissions.”
Black Bruin offers low-speed, high-
torque motors with power outputs
from 20 to 350 hp, operating speeds
up to 500 rpm and pressures to 6500
psi. Its motors are typically used for
hydrostatic transmission or as final
drives in agricultural equipment and
trailers, forestry machinery and trail-
ers, road construction and mining
equipment, and various other applica-
tions such as winches.

Black Bruin motors can be equipped with mechanical freewheel springs. When there is no pressure in the working lines of the motor, the springs are designed to push the pistons down into the cylinders and hold them there. Thus, no pump output is needed to keep the motor freewheeled. The motors can be disengaged or re-engaged while operating.

Black Bruin BB and BBC service motors offer displacement ranges from 15. 3 to 768.8 cu.in., maximum pressures from 5000 to 6525 psi, multiple-speed capability with shift-on-the-fly, and multiple brake options. The internal freewheel valve is available in both open and closed position center.

North American Hydraulics provides
inventory, technical assistance, com-
plete warranty and repair, aftermarket
spare parts inventory, rebuild pro-
grams and start-up assistance for the
mobile OEM market. Headquartered
in Baton Rouge, La., the company
has sales offices throughout the U.S.
supporting all of North America.